Headset



FIG. 1 is a front perspective view of a headset showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof; and,

FIG. 4 is a side elevation from the right side (The left side corresponds except for the absence of the microphone support).

The broken lines form no part of the claimed design. 

The ornamental design for a headset, as shown and described. 